Method for manufacturing compact thermoelectric modules

Abstract

A manufacturing method of thermoelectric modules having slight internal resistance comprising very thin plates of P type and of N type stacked alternately and connection bridges between each plate of P type and the neighbouring plates of N type. The method is characterized in that after cutting out of the plates of P and N type an alternate sequence of plates of P type and of N type is formed by assembling plates, and by inserting, between two plates, insulating sheets every other one of which extends beyond the upper face of the assembly, the others extending beyond the lower face and then by immersion of the lower and upper faces in brazing material.

We claim: 
     
       1. In a method for manufacturing thermoelectric modules including: the steps of stacking very thin plates of P type and very thin plates of N type alternately, and connecting each plate of one type to the neighboring plates which are of the other type by connection bridges arranged on the edge of said plates, the improvement comprising the steps of: taking a block of P type and a block of N type, these blocks having a parallelepipedical shape and the same dimensions;   cutting up these blocks parallel to one of their faces into plates of P type and into plates of N type;   forming a stack by assembling alternately the same number of plates of P type and of N type while inserting between the adjacent faces, insulating sheets which are very thin and have the same dimensions as the plates with the said sheets being arranged so as to be alternately recessed with respect to the plates on one face of the stack and to extend slightly beyond the other face; and   immersing in brazing material the two opposite faces of the stack beyond which the insulating sheets extend.